Datasheet A3210EUA-TL, A3210EUA-LC, A3210EUA, A3210ELH, A3209EUA-TL Datasheet (Allegro)

The A3209Ex and A3210Ex integrated circuits are ultra-sensitive, pole
independent Hall-effect switches with a latched digital output. They are
especially suited for operation in battery-operated, hand-held equipment such as
cellular and cordless telephones, pagers, and palmtop computers. 2.5 volt to

3.5 volt operation and a unique clocking scheme to reduce the average operat­ing power requirements – the A3209Ex to 400 µW, the A3210Ex to 25 µW!
Except for operating duty cycle and average operating current, the A3209Ex
and A3210Ex are identical.

Unlike other Hall-effect switches, either a north or south pole of sufficient
strength will turn the output on; in the absence of a magnetic field, the output is
off. The polarity independence and minimal power requirement allows these
devices to easily replace reed switches for superior reliability and ease of
manufacturing, while eliminating the requirement for signal conditioning.

Improved stability is made possible through chopper stabilization (dynamic
offset cancellation), which reduces the residual offset voltage normally caused
by device overmolding, temperature dependencies, and thermal stress.

These devices include on a single silicon chip a Hall-voltage generator,
small-signal amplifier, chopper stabilization, a latch, and a MOSFET output.
Advanced BiCMOS processing is used to take advantage of low-voltage and
low-power requirements, component matching, very low input-offset errors,
and small component geometries.

The A3209Ex and A3210Ex are rated for operation over a temperature
range of -40°C to +85°C. Two package styles provide a magnetically opti­mized package for most applications. Suffix ‘LH’ is a miniature low-profile
surface-mount package while suffix ‘UA’ is a three-lead ultra-mini-SIP for
through-hole or surface mounting.

FEATURES

■ Micropower Operation

■ Operate With North or South Pole

■ 2.5 V to 3.5 V Battery Operation

■ Chopper Stabilized

Superior Temperature Stability
Extremely Low Switch-Point Drift
Insensitive to Physical Stress

■ ESD Protected to 5 kV

■ Solid-State Reliability

■ Small Size

■ Easily Manufacturable With Magnet Pole Independence

Data Sheet

27622.60A

Always order by complete part number: the prefix ‘A’ + the basic four-digit
part number + the suffix ‘E’ to indicate operating temperature range + a
suffix to indicate package style, e.g., A3210ELH .

Package Suffix ‘LH’ Pinning

3209

AND

3210

ABSOLUTE MAXIMUM RATINGS

at TA = +25°C

Supply Voltage, VDD............................. 5 V

Magnetic Flux Density, B .......... Unlimited

Output Off Voltage, V

OUT

..................... 5 V

Output Current, I

OUT

.......................... 1 mA

Junction Temperature, TJ............... +170°C

Operating Temperature Range,

TA............................... -40°C to +85°C

Storage Temperature Range,

TS.............................. -65°C to +170°C

Caution: These CMOS devices have input
static protection (Class 3) but are still
susceptible to damage if exposed to
extremely high static electrical charges.

Pinning is shown viewed from branded side.

MICROPOWER, ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

X

Dwg. PH-016-1

SUPPLY

GROUND

OUTPUT

V

DD

12

3

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

2

FUNCTIONAL BLOCK DIAGRAM

Copyright © 2000, Allegro MicroSystems, Inc.

Package Suffix ‘UA’ Pinning

TIMING

LOGIC

Dwg. FH-020-5

LATCH

GROUND

OUTPUT

SUPPLY

X

DYNAMIC

OFFSET CANCELLATION

SWITCH

SAMPLE

& HOLD

Dwg. PH-016

1

SUPPLY

V

DD

GROUND

32

OUTPUT

X

Pinning is shown viewed from branded side.

600

400

200

20 60 100

140

0

AMBIENT TEMPERATURE in °C

ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS

Dwg. GH-046-3A

Suffix "UA"
R

θJA

= 206°C/W

40 80 120 180

700

500

300

100

160

Suffix "LH"
R

θJA

= 248°C/W

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

3

ELECTRICAL CHARACTERISTICS with C

BYPASS

= 0.1 µF,

over operating voltage and temperature range (unless otherwise specified).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Operate Points B

OPS

South pole to branded side – 30 60 G

B

OPN

North pole to branded side -60 -35 – G

Release Points B

RPS

South pole to branded side 5.0 22 – G

B

RPN

North pole to branded side – -27 -5.0 G

Hysteresis B

hys

|B

OPx

- B

RPx

| – 7.7 – G

NOTES: 1. As used here, negative flux densities are defined as less than zero (algebraic convention) and -50 G is less than +10 G.

2. Typical Data is at T

A

= +25°C and VDD = 2.75 V and is for design information only.

MAGNETIC CHARACTERISTICS with C

BYPASS

= 0.1 µF,

over operating voltage and temperature range (unless otherwise specified).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage Range V

DD

Operating

1)

2.5 2.75 3.5 V

Output Leakage Current I

OFF

V

OUT

= 3.5 V, B

RPN

< B < B

RPS

– «1.0 1.0 µA

Output On Voltage V

OUT

I

OUT

= 1 mA, VDD = 2.5 V – 105 300 mV

Awake Time t

awake

30 60 90 µs

Period t

period

A3209Ex 240 480 720 µs

A3210Ex 30 60 90 ms

Duty Cycle d.c. A3209Ex – 12.5 – %

A3210Ex – 0.10 – %

Chopping Frequency f

C

– 340 – kHz

Supply Current I

DD(EN)

Chip awake (enabled) 0.1 – 3.0 mA

(2.5 ≤ VDD ≤3.5 V)

I

DD(DIS)

Chip asleep (disabled) 1.0 10 50 µA

I

DD(AVG)

A3209Ex, VDD = 2.75 V – 145 425 µA

A3209Ex, VDD = 3.5 V – 195 425 µA

A3210Ex, VDD = 2.75 V – 8.8 25 µA

A3210Ex, VDD = 3.5 V – 13 60 µA

NOTES: 1. Operate and release points will vary with supply voltage.

2. B

OPx

= operate point (output turns ON); B

RPx

= release point (output turns OFF).

3. Typical Data is at TA = +25°C and VDD = 2.75 V and is for design information only.

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

4

TYPICAL OPERATING CHARACTERISTICS

as a function of temperature

A3210-- SUPPLY CURRENT

SWITCH POINTS

60

SWITCH POINTS IN GAUSS

20

0

-20

-40

0 25 50 75 100

AMBIENT TEMPERATURE IN °C

-50

Dwg. GH-027-2

-25

B

OPS

-60

40

B

RPS

B

RPN

B

OPN

VDD = 2.75 V

16

AVERAGE SUPPLY CURRENT IN µA

12

10

8.0

6.0
0 25 50 75 100

AMBIENT TEMPERATURE IN °C

-50

Dwg. GH-028-6

-25

VDD = 3.5 V

VDD = 2.5 V

14

VDD = 3 V

A3209-- SUPPLY CURRENT

220

AVERAGE SUPPLY CURRENT IN µA

180

160

140

120

0 25 50 75 100

AMBIENT TEMPERATURE IN °C

-50

Dwg. GH-028-7

-25

VDD = 3.5 V

VDD = 3 V

200

VDD = 2.5 V

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

5

SWITCH POINTS

A3210-- SUPPLY CURRENT

60

SWITCH POINTS IN GAUSS

20

0

-20

-40

2.8 3.0 3.2 3.4 3.6

SUPPLY VOLTAGE IN VOLTS

2.4

Dwg. GH-057-1

2.6

B

OPS

-60

40

B

RPS

B

RPN

B

OPN

TA = 25°C

16

AVERAGE SUPPLY CURRENT IN µA

12

10

8.0

6.0

2.8 3.0 3.2 3.4 3.6

SUPPLY VOLTAGE IN VOLTS

2.4

Dwg. GH-058-5A

2.6

14

TA = 25°C

TYPICAL OPERATING CHARACTERISTICS

as a function of supply voltage

A3209-- SUPPLY CURRENT

220

AVERAGE SUPPLY CURRENT IN µA

180

160

140

120

2.8 3.0 3.2 3.4 3.6

SUPPLY VOLTAGE IN VOLTS

2.4

Dwg. GH-058-6

2.6

200

TA = 25°C

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

6

All Allegro sensors are subjected to stringent qualification requirements prior to being released to production.

To become qualified, except for the destructive ESD tests, no failures are permitted.

CRITERIA FOR DEVICE QUALIFICATION

Qualification Test Test Method and Test Conditions Test Length Samples Comments

Biased Humidity (HAST) TA = 130°C, RH = 85% 50 hrs 77 VDD = V

OUT

= 3 V

High-Temperature JESD22-A108, 408 hrs 77 VDD = V

OUT

= 3 V

Operating Life (HTOL) TA = 150°C, TJ ≤ 165°C

Accelerated HTOL TA = 175°C, TJ ≤ 190°C 504 hrs 77 VDD = V

OUT

= 3 V

Autoclave, Unbiased JESD22-A102, Condition C, 96 hrs 77

TA = 121°C, 15 psig

High-Temperature MIL-STD-883, Method 1008, 1000 hrs 77
(Bake) Storage Life TA = 170°C

Temperature Cycle MIL-STD-883, Method 1010, 500 cycles 77

-65°C to +150°C

Latch-Up — Pre/Post 6

Reading

Electro-Thermally — Pre/Post 6
Induced Gate Leakage Reading

ESD, CDF-AEC-Q100-002 Pre/Post 3 per Test to failure,
Human Body Model Reading test All leads > 5 kV

ESD, JESD22-A115 Pre/Post 3 per Test to failure,
Machine Model Reading test All leads > 350 V

Electrical Distributions Per Specification — 30

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

7

FUNCTIONAL DESCRIPTION

Low Average Power. Internal timing circuitry activates the

sensor for 60 µs and deactivates it for the remainder of the
period (480 µs for the A3209Ex and 60 ms for the A3210Ex).
A short "awake" time allows for stabilization prior to the sensor
sampling and data latching on the falling edge of the timing
pulse. The output during the "sleep" time is latched in the last
sampled state. The supply current is not affected by the output
state.

Chopper-Stabilized Technique. The Hall element can be
considered as a resistor array similar to a Wheatstone bridge. A
large portion of the offset is a result of the mismatching of these
resistors. These devices use a proprietary dynamic offset
cancellation technique, with an internal high-frequency clock to
reduce the residual offset voltage of the Hall element that is
normally caused by device overmolding, temperature dependen­cies, and thermal stress. The chopper-stabilizing technique
cancels the mismatching of the resistor circuit by changing the
direction of the current flowing through the Hall plate using
CMOS switches and Hall voltage measurement taps, while
maintaing the Hall-voltage signal that is induced by the external
magnetic flux. The signal is then captured by a sample-and­hold circuit and further processed using low-offset bipolar
circuitry. This technique produces devices that have an
extremely stable quiescent Hall output voltage, are immune to
thermal stress, and have precise recoverability after temperature
cycling. This technique will also slightly degrade the device
output repeatability. A relatively high sampling frequency is
used in order that faster signals can be processed.

More detailed descriptions of the circuit operation can be

found in: Technical Paper STP 97-10, Monolithic Magnetic

Hall Sensor Using Dynamic Quadrature Offset Cancellation
and Technical Paper STP 99-1, Chopper-Stabilized Amplifiers
With A Track-and-Hold Signal Demodulator.

Dwg. WH-017-1

0

PERIOD

60 µs - "AWAKE"

"SLEEP"

IDD(EN)

IDD(DIS)

SAMPLE &
OUTPUT LATCHED

Dwg. EH-012-1

SAMPLE

& HOLD

X

+V

+V

HALL
VOLTAGE

B

+

—

Dwg. AH-011-2

Operation. The output of this device switches low (turns on)
when a magnetic field perpendicular to the Hall sensor exceeds
the operate point B

OPS

(or is less than B

OPN

). After turn-on, the
output is capable of sinking up to 1 mA and the output voltage
is V

OUT(ON)

. When the magnetic field is reduced below the

release point B

RPS

(or increased above B

RPN

), the device output
switches high (turns off). The difference in the magnetic
operate and release points is the hysteresis (B

hys

) of the device.
This built-in hysteresis allows clean switching of the output
even in the presence of external mechanical vibration and
electrical noise.

As used here, negative flux densities are defined as less

than zero (algebraic convention) and -50 G is less than +10 G.

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

8

SENSOR LOCATIONS

(±0.005” [0.13 mm] die placement)

Package Designator ‘LH’

Package Designators ‘UA’, UA-LC', and ‘UA-TL’

Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.

OUTPUT

Dwg. EH-013-2

0.1 µF

SUPPLY
(3 V BATTERY)

10 pF

50 kΩ

X

V

DD

1

2

3

1 32

Dwg. MH-011-11

0.018"

0.46 mm
NOM

BRANDED
SURFACE

ACTIVE AREA DEPTH

0.081"

2.06 mm

0.057"

1.45 mm

A

0.038"

0.96 mm

1 2

Dwg. MH-025

0.011"

0.28 mm
NOM

ACTIVE AREA DEPTH

0.059"

1.49 mm

A

3

Allegro

Applications. Allegro's pole-independent sensing technique
allows for operation with either a north pole or south pole
magnet orientation, enhancing the manufacturability of the
device. The state-of-the-art technology provides the same
output polarity for either pole face.

It is strongly recommended that an external bypass capaci­tor be connected (in close proximity to the Hall sensor) between
the supply and ground of the device to reduce both external
noise and noise generated by the chopper-stabilization tech­nique. This is especially true due to the relatively high imped­ance of battery supplies.

The simplest form of magnet that will operate these devices
is a bar magnet with either pole near the branded surface of the
device. Many other methods of operation are possible. Exten­sive applications information on magnets and Hall-effect
sensors is also available in the Allegro Electronic Data Book
AMS-702 or Application Note 27701, or at

www.allegromicro.com

0

+B

0

Dwg. GH-043-1

-B

OUTPUT ON

5 V

MAX

B

OPS

B

RPS

B

OPN

B

RPN

OUTPUT VOLTAGE

MAGNETIC FLUX

OUTPUT OFF

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

9

PACKAGE DESIGNATOR ‘LH’

(fits SC-74A solder-pad layout)

NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are

measured at the widest point (parting line).

2. Exact body and lead configuration at vendor’s option within limits shown.

3. Height does not include mold gate flash.

4. Where no tolerance is specified, dimension is nominal.

Dimensions in Inches

(for reference only)

Dimensions in Millimeters

(controlling dimensions)

Dwg. MA-011-3 in

12

0.039

0.094

0.03

7

0.028

3

Dwg. MA-011-3 mm

12

1.00

2.40

0.95

0.70

3

Dwg. MA-010-3B in

12

0.006

0.000

0.0079

0.0050

0.122

0.114

0.083

0.073

0.118

0.106

0.037

BSC

0.022

REF

0.020

0.012

3

0° TO 8°

0.020

MIN

0.043

0.035

0.049

0.035

Dwg. MA-010-3B mm

12

0.15

0.00

0.20

0.127

3.10

2.90

2.10

1.85

3.00

2.70

0.95

BSC

0.55

REF

0.50

0.30

3

0° TO 8°

0.25

MIN

1.10

0.90

1.25

0.90

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

10

Dimensions in Inches

(controlling dimensions)

Dimensions in Millimeters

(for reference only)

PACKAGE DESIGNATOR ‘UA’

NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are

measured at the widest point (parting line).

2. Exact body and lead configuration at vendor’s option within limits shown.

3. Height does not include mold gate flash.

4. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm).

5. Where no tolerance is specified, dimension is nominal.

Dwg. MH-014E in

0.164

0.159

0.062

0.058

0.0173

0.0138

0.050

BSC

45°

0.640

0.600

0.0189

0.0142

0.085

MAX

45°

0.031

123

0.122

0.117

SEE NOTE

Dwg. MH-014E mm

4.17

4.04

1.57

1.47

0.44

0.35

1.27

BSC

45°

16.26

15.24

0.48

0.36

2.16

MAX

45°

0.79

123

3.10

2.97

SEE NOTE

3209

AND

3210

MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

11

The products described herein are manufactured under one or
more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be
required to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components
in life-support appliances, devices, or systems without express written
approval.

The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi­bility for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.

Surface-Mount Lead Form (order A32xxEUA-TL)

0.095

±0.005

0.020

MIN

FLAT

Dwg. MH-015 in

0.004

MAX

0.002

MAX

0°–8°

2.41

±0.13

0.51

MIN

FLAT

Dwg. MH-015 mm

0.10

MAX

0.051

MAX

0°–8°

Radial Lead Form (order A32xxEUA-LC)

Dimensions in Inches

(controlling dimensions)

Dimensions in Millimeters

(for reference only)

NOTE: Lead-form dimensions are the nominals produced on the

forming equipment. No dimensional tolerance is implied or
guaranteed for bulk packaging (500 pieces per bag).

0.620"

0.500"

(15.7 mm

12.7 mm)

0.100"

(2.5 mm)

Dwg. MH-026

0.108"

(2.74 mm)

123

3209

AND

3210

MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

12

HALL-EFFECT SENSORS

Partial Part Avail. Oper. Characteristics at TA = +25°C
Number Temp. B

OP

max B

RP

min B

hys

typ Features Notes

HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of B

OP

and B

hys

3240 E/L +50 +5.0 10 chopper stabilized 1
3209 E ±60 ±5.0 7.7 400 µW, chopper stabilized
3210 E ±60 ±5.0 7.7 25 µW, chopper stabilized
3361 E +125 +40 5.0* 2-wire, chopper stabilized, inverted output
3362 E +125 +40 5.0* 2-wire, chopper stabilized
3161 E +160 +30 20 2-wire
3141 E/L +160 +10 55
3235 S +175 +25 15* output 1 2

-25 -175 15* output 2 2
5140 E +200 +50 55 300 mA power driver output 1
3142 E/L +230 +75 55
3143 E/L +340 +165 55
3144 E/L +350 +50 55
3122 E/L +400 +140 105
3123 E/L +440 +180 105
3121 E/L +450 +125 105

HALL-EFFECT LATCHES & BIPOLAR SWITCHES† in order of B

OP

and B

hys

3260 E/L +30 -30 20 bipolar switch, chopper stabilized
3280 E/L +40 -40 45 chopper stabilized
3134 E/L +50 -50 27 bipolar switch
3133 K/L/S +75 -75 52 bipolar switch
3281 E/L +90 -90 100 chopper stabilized
3132 K/L/S +95 -95 52 bipolar switch
3187 E/L [phone]*
3177 S [phone]
3625 S [phone] mA power driver output 1, 3
3626 S [phone] mA power driver output 1, 3
3195 E/L [phone] active pulldown 1
3197 L [phone]
3175 S [phone]
3188 E/L [phone]*
3283 E/L [phone] chopper stabilized
3189 E/L [phone]*
3275 S [phone]* 3
3185 E/L [phone]*

Operating Temperature Ranges:

S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C

Notes 1. Protected.

2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc
motor control. Outputs may be tied together for omnipolar operation.

3. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control.
* Minimum. ‡ Maximum
† Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal

for reliable operation over operating temperature range.